A relatively thin metallic item, having a concave or cupped contour, designed to effect its own seal by compression against the circumference of a hole. It is used as a blowout plug in boilers, engines, and the like to relieve the pressure created by the expansion of fluids caused by heat or freezing.
Classification: Parts for steam or other vapor generating boilers and super-heated water boilers, except heat exchangers
NSN 5930-01-510-3913
NSN 5920-01-608-3962
NSN 5999-00-050-3186
NSN 5920-01-008-5791
NSN 5925-01-312-4690
NSN 5990-01-540-1619
NSN 5895-01-519-2591
NSN 5996-01-601-5949
NSN 7035-01-534-7930
NSN 5910-00-085-0588
NSN 6150-01-327-7076
NSN 5920-01-446-1123